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Updated: May 26, 2026

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
09:18

Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death

Published on: December 27, 2016

Glycogen synthase kinase-3 (GSK-3) inhibition induces apoptosis in leukemic cells through mitochondria-dependent

Mohammad Reza Mirlashari1, Ingrid Randen, Jens Kjeldsen-Kragh

  • 1Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway. reza@medisin.uio.no

Leukemia Research
|December 20, 2011
PubMed

Insights

Inhibiting glycogen synthase kinase-3 (GSK-3) with SB-415286 triggers apoptosis in leukemia cells. This GSK-3 inhibition disrupts mitochondrial function and Bcl-2 family proteins, offering a potential leukemia treatment strategy.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • The role of glycogen synthase kinase-3 (GSK-3) in cell survival and apoptosis is complex and debated.
  • Understanding GSK-3's specific mechanisms in cancer is crucial for therapeutic development.

Purpose of the Study:

  • To investigate the impact of a specific GSK-3 inhibitor, SB-415286, on leukemic cell proliferation and apoptosis.
  • To elucidate the molecular pathways involved in GSK-3 inhibition-induced cell death in leukemia.

Main Methods:

  • Treatment of human leukemia cell lines (KG1a, K562, CMK) with SB-415286 (40 μM).
  • Analysis of cell cycle progression, apoptosis markers, β-catenin levels, and mitochondrial membrane potential.
  • Assessment of caspase-8 activity and expression of Bcl-2 and Bcl-xL proteins.

Main Results:

  • SB-415286 induced significant growth inhibition, G(2)/M cell cycle arrest, and apoptosis in all tested leukemic cell lines.
  • The apoptosis was independent of the death receptor pathway, indicating involvement of the intrinsic pathway.
  • GSK-3 inhibition led to mitochondrial membrane depolarization, dephosphorylation of Bcl-2, and downregulation of Bcl-xL.

Conclusions:

  • GSK-3 inhibition triggers apoptosis in leukemia cells through the intrinsic mitochondrial pathway.
  • The observed effects are mediated by modulation of Bcl-2 family proteins and mitochondrial integrity.
  • Targeting GSK-3 represents a promising therapeutic strategy for leukemia treatment.

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